Many Mustang racers have wined Reno races but they were just shy little improvements, let us go further, much further. With 4 Griffon engines the Super-Mustang (nicknamed P-51T4 as if it was military) broke the average 1,000 km/h speed limit (622mph) in level flight.

The Lightning contenders at Reno are less known, but the Super-Lightning (with 4 engines) was improved again and again to increase speed (with less maneuverability, lift, view, comfort…): RN-38A, B, C:

PS. The elevator is useful on the Lightning race cars: at high speed, moving the elevator makes the rear wheels take of, for a unique 2-wheels (lateral) layout. This would have wined (if authorised)...

Thanks!And among seaplanes, zwilling (twinning) them makes twin-hull flying boats, while... as I remove one cockpit to keep a single-seat racer layout, does it still count as twin-hull (or else asymmetric hull+float)?

The jets were so fast, it became difficult for Reno organizers to justify their refusal of any jets. So regulations were changed into a Reno-2 trophy, for aircraft with a propeller (but not necessary only-propeller). Alas competitors went from combined power to almost full jet and all was cancelled...

Additional engines on pylons increased the speed of the normal Lightning, but decreased its range (because, you know what? Engines are powerful but selfish animals, drinking fuel no matter if the other ones need it).